Author: Steven J. Brann
Date: 18:00:28 10/16/03
Go up one level in this thread
On October 16, 2003 at 18:50:32, William Kerr wrote: > >Worlds toughest until someone finds a tougher one. > >After timing engines solving many mates in four, this one was by far the >toughest. > >[D] 8/3p1p2/5Ppp/K2R2bk/4pPrr/6Pp/4B2P/3N4 w - - bm Nc3;id #1097 mate in 4 >very-very tough; > >This is a composed mate in 4 problem from Benko's Baffler's #1097. > >Most engines take a very long time to find the mate in 4. > >For PC programs with no CPU speed mentioned were run on a P2 300 Mhz. >Morphy was from the Great Game system 6502 at 2 Mhz. > >m6 = anounced mate in 6 >no solve is usually 10 minutes > >Chessmaster 9000 6:14 m11, 8:51 m6, 9:59 m4 >crafty no solve >pocket fritz < 44 sec >yace < 7 min m11, 26:30 m4 >ruffian 1.0.0 no solve >bringer 15 min no solve >rebel10 17 sec m6, 37 sec m4 >uscf 5 sec >morphy 5:27 >rebel12 no solve 7:00 >ruffian 1.0.1 1:53 m11 >fritz532 3:21 m8 Nc3 >pocket genius 3 min no solve >pocket grandmaster 6 min Ne3 +12.26 12/51 >extreme 2:54 m6 16/34 >doctor3 15 sec m4 >sargon4 5 sec m4 (old PC chess program) >lg2kv2.7 10 min no solve >wkchess 33 sec >yacepdb 30 sec m4 >Novag sapphire ii 1:33 m5 >Novag star diamond 0:55 m5 >Chessmaster 9000 1.7 Ghz AMD 0:42 m11, 0:59 m6, 1:06 m4 > >Post a tougher one than this if you know of one. > >Bill Chessmaster 9000 on a 3.0G P4 default personality with SS=12 finds Mate in 4 in less than a minute: Time Depth Score Positions Moves 0:00 1/3 4.47 464 1.gxh4 Kxh4 2.Bxg4 Bxf4 0:00 1/3 4.72 595 1.fxg5 e3 2.gxh4 0:00 1/4 5.19 1165 1.fxg5 hxg5 2.gxh4 Kxh4 3.Bxg4 Kxg4 4.Rxd7 0:00 1/5 6.29 2283 1.fxg5 hxg5 2.gxh4 Kxh4 3.Bxg4 Kxg4 4.Rxd7 Kf5 5.Rxf7 0:00 1/6 5.97 6046 1.fxg5 hxg5 2.gxh4 Kxh4 3.Bxg4 Kxg4 4.Rxd7 Kf3 5.Rxf7 e3 0:00 1/6 8.93 16707 1.Ne3 d6 2.fxg5 hxg5 3.gxh4 Kxh4 4.Nxg4 Kh5 5.Nf2+ Kh6 6.Nxe4 0:00 1/7 8.93 23184 1.Ne3 d6 2.fxg5 hxg5 3.gxh4 Kxh4 4.Nxg4 Kh5 5.Nf2+ Kh6 6.Nxe4 0:00 1/8 10.00 44094 1.Ne3 d6 2.fxg5 hxg5 3.gxh4 Kxh4 4.Nxg4 Kh5 5.Ne5+ g4 6.Nxf7+ Kh4 7.Nxd6 e3 0:00 2/9 10.10 123430 1.Ne3 d6 2.fxg5 hxg5 3.gxh4 Kxh4 4.Nxg4 Kh5 5.Ne5+ g4 6.Nxf7+ Kh4 7.Rg5 e3 8.Rxg4+ Kh5 9.Nxd6 0:02 3/10 10.56 1041164 1.Ne3 d6 2.fxg5 hxg5 3.gxh4 Kh6 4.Nxg4+ Kh7 5.hxg5 Kg8 6.Rxd6 Kh7 7.Rd7 0:08 4/11 11.33 4200009 1.Ne3 d6 2.fxg5 hxg5 3.gxh4 Kh6 4.Nxg4+ Kh7 5.hxg5 e3 6.Nxe3 Kg8 7.Kb4 Kf8 8.Rxd6 0:36 5/12 Mate11 17943766 1.Ne3 d6 2.Nc4 e3 3.fxg5 hxg5 4.Nxd6 Kh6 5.Nxf7+ Kh7 6.Bxg4 e2 7.Bxe2 Rh5 8.Rd8 g4+ 9.Kb6 Rb5+ 10.Bxb5 g5 11.Bd3# 0:49 5/12 Mate06 24607158 1.Nc3 e3 2.Ne4 d6 3.Rxd6 Bxf4 4.gxf4 g5 5.Ng3+ Kg6 6.Bd3# 0:54 6/13 Mate04 27874086 1.Nc3 e3 2.Rb5 d6 3.Nd5 Bxf6 4.Nxf6# 0:54 7/14 Mate04 27907548 1.Nc3 e3 2.Rb5 d6 3.Nd5 Bxf6 4.Nxf6# Steve
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